The MAC address is a unique hardware address. MAC addresses are 12 characters, of digits 0-9 and letters A-F. They are normally presented as 6 groups of 2, separated by colons or hyphens. For example:

*NOTE: The bluetooth address is similar, but will not work. Please doulble check that you are reading the wifi address.

00:11:22:33:44:5500-11-22-33-44-55

Occasionally you may see different presentations, such as:

0011.2233.4455001122334455

Many modern machines have multiple network adapters, and it's important to select the right one - that is, the one you're reporting a problem for. For example, a machine might have some or all of:

wiredwirelessbluetooth"virtual" network cards, such as VPN etc.Follow the instructions below to find the MAC address for your machine.

Windows (Vista, 7)Open the "Start" menuType "network and sharing", and hit returnSelect "change adapter settings" at the top-leftRight-click the adapter you want, and select StatusClick the Details... buttonThe MAC address is listed as "Physical Address"You can copy this information to the clipboard by pressing Ctrl+C and then paste it into an email

Windows XPIf you have a "My Network Places" icon on the desktop:Right-click "My Network Places" icon and select "Properties" from the menuRight-click the adapter you want, and select StatusSelect the Support tab, and click the Details... buttonThe MAC address is listed as "Physical Address"You can copy this information to the clipboard by pressing Ctrl+C and then paste it into an emailIf you don't have "My Network Places", use the instructions below

Windows (2000, XP, Vista, 7)

Open the "Start" menuSelect the "Run..." itemType "cmd" in the box and click "OK"A command prompt will open upType "ipconfig /all" at the prompt and hit returnA list of information will be printed - you may need to scroll back up, or alternatively, try running "ipconfig /all | more" instead. Note down the MAC address of the correct network adaptor (there may be more than one - see note below)Windows legacy systems (95/98/ME)Open the "Start" menuSelect the "Run..." itemType "winipcfg" in the box and click "OK"A program will start that lists the network adaptors attached to your machine. Select the correct adaptor from the dropdown list and note down the MAC address

MacOS X (Tiger)Go to the Apple Menu and select System PreferencesClick NetworkFrom the Show menu, select the adapter you wantFor wireless - select Airport. The MAC address will be listed as the "Airport ID"For wired - select Built in Ethernet. The MAC address will listed as the "Ethernet ID."

MacOS X (Snow Leopard)Go to the Apple Menu and select System PreferencesClick NetworkFrom the Show menu, select the adapter you wantFor wireless - select AirportFor wired - select EthernetClick on the Advanced buttonGo to the Ethernet tabThe MAC address will be show as the "Ethernet ID"